Switch to pypi token

[paulf81]

Switch to pypi token

On last FLASC release, an error occurred because PYPI no longer allows username and passwords. https://github.com/NREL/flasc/actions/runs/12439527845. Can be fixed by switching to API token.

[paulf81]

Adding some additional context, there is this page:

https://pypi.org/help/#apitoken

And then the steps were something like:

1. Generate API token on pypi
2. Add the token to a secret on floris github
3. Change github ci line as it is for FLASC

[misi9170]

Also, here is the commit where the changes to the ci lines were recently done in FLASC